4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/f2fs_fs.h>
13 #include <linux/pagemap.h>
14 #include <linux/sched.h>
15 #include <linux/ctype.h>
16 #include <linux/dcache.h>
22 #include <trace/events/f2fs.h>
24 static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
26 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
29 bool nid_free = false;
32 inode = new_inode(dir->i_sb);
34 return ERR_PTR(-ENOMEM);
37 if (!alloc_nid(sbi, &ino)) {
44 inode_init_owner(inode, dir, mode);
48 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
49 inode->i_generation = sbi->s_next_generation++;
51 err = insert_inode_locked(inode);
57 trace_f2fs_new_inode(inode, 0);
58 mark_inode_dirty(inode);
63 unlock_new_inode(inode);
65 trace_f2fs_new_inode(inode, err);
66 make_bad_inode(inode);
69 alloc_nid_failed(sbi, ino);
73 static int is_multimedia_file(const unsigned char *s, const char *sub)
75 size_t slen = strlen(s);
76 size_t sublen = strlen(sub);
81 return !strncasecmp(s + slen - sublen, sub, sublen);
85 * Set multimedia files as cold files for hot/cold data separation
87 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
88 const unsigned char *name)
91 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
93 int count = le32_to_cpu(sbi->raw_super->extension_count);
94 for (i = 0; i < count; i++) {
95 if (is_multimedia_file(name, extlist[i])) {
102 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
105 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
110 f2fs_balance_fs(sbi);
112 inode = f2fs_new_inode(dir, mode);
114 return PTR_ERR(inode);
116 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
117 set_cold_files(sbi, inode, dentry->d_name.name);
119 inode->i_op = &f2fs_file_inode_operations;
120 inode->i_fop = &f2fs_file_operations;
121 inode->i_mapping->a_ops = &f2fs_dblock_aops;
125 err = f2fs_add_link(dentry, inode);
130 alloc_nid_done(sbi, ino);
132 d_instantiate(dentry, inode);
133 unlock_new_inode(inode);
137 unlock_new_inode(inode);
138 make_bad_inode(inode);
140 alloc_nid_failed(sbi, ino);
144 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
145 struct dentry *dentry)
147 struct inode *inode = old_dentry->d_inode;
148 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
151 f2fs_balance_fs(sbi);
153 inode->i_ctime = CURRENT_TIME;
156 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
158 err = f2fs_add_link(dentry, inode);
163 d_instantiate(dentry, inode);
166 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
171 struct dentry *f2fs_get_parent(struct dentry *child)
173 struct qstr dotdot = QSTR_INIT("..", 2);
174 unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
176 return ERR_PTR(-ENOENT);
177 return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
180 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
183 struct inode *inode = NULL;
184 struct f2fs_dir_entry *de;
187 if (dentry->d_name.len > F2FS_NAME_LEN)
188 return ERR_PTR(-ENAMETOOLONG);
190 de = f2fs_find_entry(dir, &dentry->d_name, &page);
192 nid_t ino = le32_to_cpu(de->ino);
194 f2fs_put_page(page, 0);
196 inode = f2fs_iget(dir->i_sb, ino);
198 return ERR_CAST(inode);
200 stat_inc_inline_inode(inode);
203 return d_splice_alias(inode, dentry);
206 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
208 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
209 struct inode *inode = dentry->d_inode;
210 struct f2fs_dir_entry *de;
214 trace_f2fs_unlink_enter(dir, dentry);
215 f2fs_balance_fs(sbi);
217 de = f2fs_find_entry(dir, &dentry->d_name, &page);
222 err = acquire_orphan_inode(sbi);
226 f2fs_put_page(page, 0);
229 f2fs_delete_entry(de, page, inode);
232 /* In order to evict this inode, we set it dirty */
233 mark_inode_dirty(inode);
235 trace_f2fs_unlink_exit(inode, err);
239 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
242 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
244 size_t symlen = strlen(symname) + 1;
247 f2fs_balance_fs(sbi);
249 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
251 return PTR_ERR(inode);
253 inode->i_op = &f2fs_symlink_inode_operations;
254 inode->i_mapping->a_ops = &f2fs_dblock_aops;
257 err = f2fs_add_link(dentry, inode);
262 err = page_symlink(inode, symname, symlen);
263 alloc_nid_done(sbi, inode->i_ino);
265 d_instantiate(dentry, inode);
266 unlock_new_inode(inode);
270 unlock_new_inode(inode);
271 make_bad_inode(inode);
273 alloc_nid_failed(sbi, inode->i_ino);
277 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
279 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
283 f2fs_balance_fs(sbi);
285 inode = f2fs_new_inode(dir, S_IFDIR | mode);
287 return PTR_ERR(inode);
289 inode->i_op = &f2fs_dir_inode_operations;
290 inode->i_fop = &f2fs_dir_operations;
291 inode->i_mapping->a_ops = &f2fs_dblock_aops;
292 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
294 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
296 err = f2fs_add_link(dentry, inode);
301 alloc_nid_done(sbi, inode->i_ino);
303 d_instantiate(dentry, inode);
304 unlock_new_inode(inode);
309 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
311 unlock_new_inode(inode);
312 make_bad_inode(inode);
314 alloc_nid_failed(sbi, inode->i_ino);
318 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
320 struct inode *inode = dentry->d_inode;
321 if (f2fs_empty_dir(inode))
322 return f2fs_unlink(dir, dentry);
326 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
327 umode_t mode, dev_t rdev)
329 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
333 if (!new_valid_dev(rdev))
336 f2fs_balance_fs(sbi);
338 inode = f2fs_new_inode(dir, mode);
340 return PTR_ERR(inode);
342 init_special_inode(inode, inode->i_mode, rdev);
343 inode->i_op = &f2fs_special_inode_operations;
346 err = f2fs_add_link(dentry, inode);
351 alloc_nid_done(sbi, inode->i_ino);
352 d_instantiate(dentry, inode);
353 unlock_new_inode(inode);
357 unlock_new_inode(inode);
358 make_bad_inode(inode);
360 alloc_nid_failed(sbi, inode->i_ino);
364 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
365 struct inode *new_dir, struct dentry *new_dentry)
367 struct f2fs_sb_info *sbi = F2FS_SB(old_dir->i_sb);
368 struct inode *old_inode = old_dentry->d_inode;
369 struct inode *new_inode = new_dentry->d_inode;
370 struct page *old_dir_page;
371 struct page *old_page, *new_page;
372 struct f2fs_dir_entry *old_dir_entry = NULL;
373 struct f2fs_dir_entry *old_entry;
374 struct f2fs_dir_entry *new_entry;
377 f2fs_balance_fs(sbi);
379 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
383 if (S_ISDIR(old_inode->i_mode)) {
385 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
393 if (old_dir_entry && !f2fs_empty_dir(new_inode))
397 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
404 err = acquire_orphan_inode(sbi);
408 if (update_dent_inode(old_inode, &new_dentry->d_name)) {
409 release_orphan_inode(sbi);
413 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
414 down_write(&F2FS_I(old_inode)->i_sem);
415 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
416 up_write(&F2FS_I(old_inode)->i_sem);
418 new_inode->i_ctime = CURRENT_TIME;
419 down_write(&F2FS_I(new_inode)->i_sem);
421 drop_nlink(new_inode);
422 drop_nlink(new_inode);
423 up_write(&F2FS_I(new_inode)->i_sem);
425 mark_inode_dirty(new_inode);
427 if (!new_inode->i_nlink)
428 add_orphan_inode(sbi, new_inode->i_ino);
430 release_orphan_inode(sbi);
432 update_inode_page(old_inode);
433 update_inode_page(new_inode);
437 err = f2fs_add_link(new_dentry, old_inode);
445 update_inode_page(new_dir);
449 old_inode->i_ctime = CURRENT_TIME;
450 mark_inode_dirty(old_inode);
452 f2fs_delete_entry(old_entry, old_page, NULL);
455 if (old_dir != new_dir) {
456 f2fs_set_link(old_inode, old_dir_entry,
457 old_dir_page, new_dir);
458 down_write(&F2FS_I(old_inode)->i_sem);
459 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
460 up_write(&F2FS_I(old_inode)->i_sem);
461 update_inode_page(old_inode);
463 kunmap(old_dir_page);
464 f2fs_put_page(old_dir_page, 0);
467 mark_inode_dirty(old_dir);
468 update_inode_page(old_dir);
477 f2fs_put_page(new_page, 0);
480 kunmap(old_dir_page);
481 f2fs_put_page(old_dir_page, 0);
485 f2fs_put_page(old_page, 0);
490 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
492 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
496 inode = f2fs_new_inode(dir, mode);
498 return PTR_ERR(inode);
500 inode->i_op = &f2fs_file_inode_operations;
501 inode->i_fop = &f2fs_file_operations;
502 inode->i_mapping->a_ops = &f2fs_dblock_aops;
505 err = acquire_orphan_inode(sbi);
509 err = f2fs_do_tmpfile(inode, dir);
514 * add this non-linked tmpfile to orphan list, in this way we could
515 * remove all unused data of tmpfile after abnormal power-off.
517 add_orphan_inode(sbi, inode->i_ino);
520 alloc_nid_done(sbi, inode->i_ino);
521 d_tmpfile(dentry, inode);
522 unlock_new_inode(inode);
526 release_orphan_inode(sbi);
530 unlock_new_inode(inode);
531 make_bad_inode(inode);
533 alloc_nid_failed(sbi, inode->i_ino);
537 const struct inode_operations f2fs_dir_inode_operations = {
538 .create = f2fs_create,
539 .lookup = f2fs_lookup,
541 .unlink = f2fs_unlink,
542 .symlink = f2fs_symlink,
546 .rename = f2fs_rename,
547 .tmpfile = f2fs_tmpfile,
548 .getattr = f2fs_getattr,
549 .setattr = f2fs_setattr,
550 .get_acl = f2fs_get_acl,
551 .set_acl = f2fs_set_acl,
552 #ifdef CONFIG_F2FS_FS_XATTR
553 .setxattr = generic_setxattr,
554 .getxattr = generic_getxattr,
555 .listxattr = f2fs_listxattr,
556 .removexattr = generic_removexattr,
560 const struct inode_operations f2fs_symlink_inode_operations = {
561 .readlink = generic_readlink,
562 .follow_link = page_follow_link_light,
563 .put_link = page_put_link,
564 .getattr = f2fs_getattr,
565 .setattr = f2fs_setattr,
566 #ifdef CONFIG_F2FS_FS_XATTR
567 .setxattr = generic_setxattr,
568 .getxattr = generic_getxattr,
569 .listxattr = f2fs_listxattr,
570 .removexattr = generic_removexattr,
574 const struct inode_operations f2fs_special_inode_operations = {
575 .getattr = f2fs_getattr,
576 .setattr = f2fs_setattr,
577 .get_acl = f2fs_get_acl,
578 .set_acl = f2fs_set_acl,
579 #ifdef CONFIG_F2FS_FS_XATTR
580 .setxattr = generic_setxattr,
581 .getxattr = generic_getxattr,
582 .listxattr = f2fs_listxattr,
583 .removexattr = generic_removexattr,